The ornamental design for a displayobjectpendant, as shown and described.
FIG. 1 is a front view of a display object pendant.
FIG. 2 is a rear view of the display object pendant.
FIG. 3 is a top end view of the display object pendant.
FIG. 4 is a bottom end view of the display object pendant.
FIG. 5 is a right side view of the display object pendant.
FIG. 6 is a left side view of the display object pendant; and,
FIG. 7 is an upper perspective view of the display object pendant with broken lines indicating an environment in which the display object pendant is used and forming no part of the claimed design.